Ozzy Osbourne has revealed that he has two smiley face tattoos on his kneecaps, which he talks to when he is feeling lonely.

While appearing on Late Night With Conan O'Brien, Ozzy explained, "I hate being alone. I suffer from loneliness. So, I just got two little faces on my knees.

"When I'm p***ing people off, they don't want to talk to me. I can always pretend they're alive and talk to them.

"My son [Jack] has just had it done – it's like a family tradition."